New Mopar Part #s

Can anyone tell me what tail end letters mean on new Chrysler part numbers?

Ex. I'm looking for timing cover 4792795AD for a 2006-10 Charger. I'm seeing visually identical parts listed for Jeeps, but the number is 4792795AC. They "look" the same, but gotta be different in some way or else they'd have identical numbers, right?

superseded part numbers in most cases.

From what I understand, the succession of the letters is a modification to the original part that does not affect the interchange. IOW, AC is an earlier version of AD; AD is an "improved" part.

Second character of the suffix is usually a revison which normally does not affect form, fit, or function.

If I remember correctly this is required to help keep track of things even when the part is the same but supply chain has changed.
A change of packager or tier 1 machine shop would require a suffix rev even though they're all supposed to be making
the part to the same specs, and you may not be able to see or measure any difference.

Anyway If I knew I needed an A*, I'd bolt on an AA through AZ without a whole lot of concern.

Coorect.....If the first letter in the suffix changes. The form fit or function was affected by the change. So, AA to AB no effect on form fit function. AA to BA = Affect on form fit or function.

Great replies...thanks all!

That's exactly how it worked on the production assembly line.

I've heard the letter can also change if they started using a different vendor to make it easier to identify parts if there are problems.

Yep, we’re on the same page.
First letter of the suffix is the design, second letter is the revision level within the context of that design.

This is as “smart” as a Mopar part number can get, other than odd-left, even-right (with few exceptions and errors), but after
Almost 9 years of it I accepted that other deal as more cultural rather than rule. (Or why would the errors be allowed to exist?).